Prototype pollution in Adobe Reader and Adobe Acrobat - CVE-2026-34622
Published: April 14, 2026
Vulnerability identifier: #VU126063
CSH Severity: High
CVSS v4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-34622
CWE-ID: CWE-1321
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary JavaScript code.
The vulnerability exists due to improper input validation. A remote attacker can trick the victim into opening a specially crafted PDF file and execute arbitrary code on the system.
Note, the vulnerability may allow an attacker to compromise the affected system.
Affected software
Adobe Reader
Adobe Acrobat
Adobe Acrobat
How to mitigate CVE-2026-34622
Install updates from vendor's website.
Adobe Reader - update to 26.001.21431
Adobe Acrobat - addressed in versions 24.001.30365, 26.001.21431
Adobe Acrobat - addressed in versions 24.001.30365, 26.001.21431